Analysis of Fracture Mechanism of Cast Steel for Different States of Stress

• Autorzy: Lachowski J. , Borowiecka-Jamrozek J.

Identyfikatory

DOI

10.24425/afe.2021.136094

• Języki publikacji: EN

Abstrakty

EN

In this paper a plastic deformation and a damage evolution in low-carbon cast steel containing non-metallic inclusions are analysed experimentally and numerically. Two microstructures of the cast steel have been obtained after appropriate heat treatment. Tensile tests of smooth specimens and axisymmetric notched specimens have been performed. The notched specimens have the notch radii: 1 mm, 3 mm and 7 mm. Fractography of the specimens was carried out to observe fracture mechanisms. The mechanism depended on the stress state in the notched specimens. The fractography showed the existence of two fracture mechanisms: ductile failure and by shear. The process of the voids growth formed on the non-metallic inclusions was the process which included in the explanation of the damage mechanism. Modelling of deformation of the specimens has been used with the model suggested by Gurson, Tvergaard and Needleman. The model is implemented in the Abaqus finite element program. The computer simulation was performed using ABAQUS system. The computed output was compared with the experimental results obtained for specimens of the same shape.

Słowa kluczowe

EN

metallography; mechanical properties; cast steel; deformation; stress; computer modelling

PL

metalografia; właściwości mechaniczne; staliwo; odkształcenia; naprężenia; modelowanie komputerowe

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2021
• Tom: Vol. 21, iss. 2
• Strony: 29--34
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Lachowski J.

• Kielce University of Technology, Kielce, Poland

autor

Borowiecka-Jamrozek J.

• Kielce University of Technology, Kielce, Poland

Bibliografia

• [1] Lachowski, J. & Biel-Gołaska M. (2000). Modelling of Damage Evolution in Cast Steel, Conference Advances in Mechanical Behaviour, Plasticity and Damage EUROMAT 2000, 7-9 November, pp. 1457-1462, Tours, France.
• [2] Gurson, A.L. (1977). Continuum theory of ductile rupture by void nucleation and growth. Journal of Engineering Materials Technology. 99, 2-15.
• [3] Tvergaard, V. & Needleman, A. (1984). Analysis of the cup-cone fracture in a round tensile bar. Acta Metallurgica. 32(1), 157-169.
• [4] Needleman, A. & Tvergaard, V. (1984). An analysis of ductile rupture in notched bars. Journal of Mechanics and Physics of Solids. 32(6), 461-490.
• [5] Bridgman, P.W. (1952). Studies in Large Plastic Flow and Fracture. Harvard University Press, Cambridge, Massachusetts, Chapter 1.
• [6] Biel-Gołaska, M. & Gołaski, L. (1994). The analysis of the ductile failure process of cast steel subjected to triaxial stress states, Foundry Reaserch Institute, Cracow, XLIV, No 1-2, pp. 37-57.
• [7] Borowiecka-Jamrozek, J., Lachowski, J. (2014). An analysis of stresses in an Al-5%Si alloy under load, Conference "Recent Trends in Structural Materials", COMAT 2014, Nov. 19-21, pp. 6. Pilzen, Czech Republic.
• [8] Koplik, J. & Needleman, A. (1988). Void coalescence in porous plastic solids. International Journal of Solids Structures. 24(8), 835-853.
• [9] Richelsen, A.B. & Tvergaard, V. (1994). Dilatant plasticity or upper bound estimates for porous ductile solids. Acta metall materialia. 42(8), 2561-2577.
• [10] Tvergaard V. (2001). Crack growth predictions by cohesive zone model for ductile fracture. Journal of Mechanics and Physics of Solids. 49, 2191-2207.
• [11] SIMULIA Dassault System, Abaqus analysis user’s manual, Version 6.12 , 2017.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).